43242561645 has 8 divisors (see below), whose sum is σ = 69188098656. Its totient is φ = 23062699536.

The previous prime is 43242561629. The next prime is 43242561647. The reversal of 43242561645 is 54616524234.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43242561645 - 2⁴ = 43242561629 is a prime.

It is a super-3 number, since 3×43242561645³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43242561597 and 43242561606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43242561647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1441418707 + ... + 1441418736.

It is an arithmetic number, because the mean of its divisors is an integer number (8648512332).

Almost surely, 2^43242561645 is an apocalyptic number.

It is an amenable number.

43242561645 is a deficient number, since it is larger than the sum of its proper divisors (25945537011).

43242561645 is a wasteful number, since it uses less digits than its factorization.

43242561645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882837451.

The product of its digits is 691200, while the sum is 42.

The spelling of 43242561645 in words is "forty-three billion, two hundred forty-two million, five hundred sixty-one thousand, six hundred forty-five".